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package org.glassfish.security.services.common;

import java.security.PrivilegedAction;

import org.glassfish.hk2.api.ServiceLocator;

public class PrivilegedLookup<T> implements PrivilegedAction<T> {
        
    private ServiceLocator serviceLocator;
    private Class<T> serviceClass;
    private String serviceName;
    
    /**
     * 
     * @param serviceLocator   the HK2 service locator
     * @param serviceClass   the protected HK2 service to be looked up
     * @param serviceName    the name of the service to be looked
     */
    public PrivilegedLookup(ServiceLocator serviceLocator,
            Class<T> serviceClass, String serviceName) {
        this.serviceLocator = serviceLocator;
        this.serviceClass = serviceClass;
        this.serviceName = serviceName;
    }

    /**
     * 
     * @param serviceLocator   the HK2 service locator
     * @param serviceClass   the protected HK2 service to be looked up
     */
    public PrivilegedLookup(ServiceLocator serviceLocator, Class<T> serviceClass) {
        this(serviceLocator, serviceClass, null);
    }

    public T run() {
        if (serviceName != null)
            return serviceLocator.getService(serviceClass, serviceName);
        else
            return serviceLocator.getService(serviceClass);
    }
}
